$500,000 reward offered for Olympic Park bomber

Voice of 911 caller played for first time

ATLANTA (CNN) -- The FBI launched a new strategy Monday in
its investigation of last July's Centennial Olympic Park
bombing -- releasing the tape of the 911 call that warned of
the bomb, and offering a $500,000 reward.

FBI Deputy Director Weldon Kennedy also displayed a green
Army knapsack similar to the one that carried what he said was a 40-pound bomb.

"We are releasing these pieces of evidence in hopes that
members of the public who have yet to realize they have
important information, or photos, or videos will help solve
this case by calling us," Kennedy said at a news conference
in Atlanta.

Kennedy announced the
$500,000 reward for information leading to the arrest and
conviction of those responsible for the July 27 bombing. One
person was killed in the explosion, and more than 100 were
injured.

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Kennedy played the 911 call, which came in to the Atlanta
Police Department 22 minutes before the pipe bomb exploded in
the park during a late night concert.

"There is a bomb in Centennial Park," the mystery caller told
the 911 operator. "You have 30 minutes."

The tape has been analyzed by FBI voice print experts, but
the results were inconclusive. On Monday, the FBI asked for
help from the public in identifying the voice on the tape,
and also put out a call for anyone who has photos and videos
taken in the park, in an effort to generate fresh leads in
the case.

Sources say that videotapes and photographs taken in the park
that night indicate that the bomb may have been planted as
long as an hour before it went off.

In recent weeks the FBI has interviewed a number of people
who took photographs in the park, in an attempt to find the
bomber or bombers. They have also re-interviewed some of
those wounded in the bombing as well as witnesses near the
sound tower where the bomb went off.

Handling of Jewell under investigation

The FBI has faced a barrage of criticism for its handling of
the investigation, especially after security guard Richard
Jewell -- who initially brought the knapsack containing the
bomb to police attention -- became a high-profile suspect and
then was dropped as a target of the investigation.

On October 26, the government sent a letter to Jewell,
telling him that he was no longer a target.

The Senate plans to hold a hearing on the FBI's handling of
the case and how Jewell's name got out. The hearing has been
delayed while the Justice Department finishes two internal
probes into the FBI's handling of Jewell.

Sources close to the investigation say they still expect the
case to be solved, but said that no arrest is imminent.

The FBI has set up a toll free number: 1-888-324-9797
for those with any information.